Volgogradetzzz

Tnanks. Sad, by I have very primitive API - something like directX 8.

Ok, thanks, you convince me. I'll try )

Sorry, guys, I didn't understand. Can you explain in more details please? And I'll try to explain what I want - I'm rendering my geometry as usual, but in fragment shader I want to remember some value depending on that fragment position. In order to store something I have to use a texture. But I want to store my data in some ordder - to retrieve it lately. For example, my world is divided by cells and when I shade a pixel I know which cell it belongs to. And I want to store some data, assosiated with that cell. How can I do it?

No no, that's not what I want. I want to render to, say, upper left pixel in texture, i.e. in uv = (0; 0).

Yes yes, I need just simple simulation - flat ground, no collisions. Paradigm Shifter, case with parabolas is interesting. But I'm affraid it will look bad. I already tried with damping sin function and it was not good visually.